Clutches and the like



Nw, 2,1926. 1 www5! H. FROOD ET AL MANUF'AC'IUREF FRICTION DKISKS FOR USE IN CLUTCHES AND THE LIKE Filed OCt. 16, 1924 j Fig@ los Patented Non. E, Y Wdh..

ai iIr ii inattesa HERBERT FRODD'AN) WTER`RICHARD SYIDEE, OF CHAPEL-EN-LE FRITH, 'ENGLAND,

, MANUFACTURIE OF .FBICTION DISKS FOR USE N CLUTCHES AND THE LIKE.

Application led October 16,A 192e, SeratNof 744,061, and in Great Britain November 21g 1923.

sired length, the mandrel being then with .y

drawn. and the tubular body flattened and laid in ring form, in a die wherein it is compressed and consolidated by heat, pressure and a resinous condensation substance, thus producingan annular friction disk.

yIn one convenient application of the in vcntion., an asbestos or other inorganic yarn1 is Wound with a quick traverse motion upon a collapsible or removable mandrel which may consists of tight-ly stranded Wires 0r be otherwise formed so as to produce a iat tw bular body. The yarn is impregnated' or coated before Winding by passing it through a bath contaminar a solution of the .phenol formaldehyde condensation product known as `'synthetic resin or bakelite. After Winding is completed (the number of' layers in the Wind determined. byv the thickness of the disk to be produced) the mass is dried whilst in position upon the mandrel. 'fhe latter is now Withdrawn, when the tubular body fiat'tens and resembles a tape or strip. lt is then laid or Wound into the recess in an 'annular die, the ends of the tapev overlapping. Such ends may be cut at an angle or tapered olf. Themale portionnof the die is placed in position and the material subjected to heat and pressure whereby it is coinpressed and consolidated into a ring of the desired thickness and the resinous material converted into an infusible insoluble-binder.'

lf desired, the mandrel. may be covered` with a sleeve of fabric or textile material before Windingr thereon commences and .the said sleeve may be allowedto remain in the Wound mass to add strength thereto.y

T he ring or annular disk fromthe dies'is then truedup in any suitable machine for that purpose.

The accompanying sheet of explanatoryv drawings illustrates the applicationof our invention. v r

Figure l is an elevation and Figure 2 a sectional end iView showing the manner of i Winding' the yarny in the collapsible` mandrel.

ln elearness of illustration the yarn is represented by a dotted line` in Figure 2.

Figure 3 is a plan and Figure 4 a sectional elevati on showing' the dies for the formation of the annular disks from such Wound yarn.

Figure is an elevation and Figure 6 an end View -of a completed disk.

The mandrel is made up of tin metal Wires as a and in the example illustrated there is passed over the mandrel a fabric sleeve o. The yarn c, impregnated with the synthetic resin, is Wound around and along such'sleeve and at theconelusion of the Winding the tubular body formed by the yarn with the sleeve o constituting av lining therefor is .withdrawn from the mandrelj and when flattened, after such Withdrawal, it resembles a tape or strip. After cutting its ends cli--l agonally or tapering7 such strip Z 1s placed in ring forni in a heated die as 'e which has an annular recess to receive it; the diagonal v ends f of the strip overlap as shown at Fig! ure 3. TWhilst in the die e the strip d is subjected to' pressure applied by the die g and under such .pressure is'consolidated to the complete ring in annular disk form which is repregented byA the nished article at Fig? ures 5 and V6.

' l. A process of manufacturing friction disks, comprisingthe impregnation' of yarn with a synthetic resin. ceiling said impregnated yarn upon a collapsiblemandrel, drying the yarn' and subsequently withdrawing the mandrel from the yarn, flattening the coil, inserting said flattened coil in an annu lar die to form a ring with over-lapping ends andsubjecting said ring in said die to heat and pressi'ireifor the formation of the re. quired annular disk.

P 2. i process of manufacturing friction disks, comprising Windingyarn on a collapsible eore toform a tubularbody, Withdrawing'said mandrel from said body and flattoning and placing the said body in ring Vform in a die, wherein it 'is compressed and consolidated by heat and pressure vto form an annular disk, said yarn being impreg- In testimony whereof We have signed our naines to this specification.

HERBERT FROD.

ice

los

. Waarna mennen siriane. 

